Description

The European woodwasp, Sirex noctilio F., was discovered in Oswego County, New York, in the autumn of 2004. The woodwasp is apparently not under effective natural control, is already distributed over a wide area in North America, and because it is a killer of relatively healthy trees, poses a serious threat to pine forests and plantations in the United States and Canada if not controlled. Its most effective natural enemy is a parasitic nematode, Beddingia (Deladenus) siricidicola (Bedding).